BlueMax Marine Group 31
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Description
Exceptional dual-purpose power for starting and deep-cycling all on one battery.
- Dual-Purpose Performance: Deliver a massive 1200 Cold Cranking Amps (CCA) to effortlessly start your marine engines while reserving 160Ah of deep-cycle capacity for house electronics.
- Massive Weight Reduction: Weighing only 38 lbs, this lithium battery shaves substantial weight off your vessel compared to traditional lead-acid equivalents, instantly improving speed and fuel efficiency.
- Intelligent Safety: Built with an Advanced Battery Management System (BMS) equipped with active cell balancing, low-voltage disconnect, and a reliable low-temperature charging cutoff.
- Proven Longevity: Engineered to provide 5,000+ cycles at 80% Depth of Discharge, maximizing your return on investment over years of harsh marine use.
What This Upgrade Fixes
Eliminate the anxiety of a dead starter battery after running trolling motors and electronics all day long. This upgrade ends the routine maintenance, heavy lifting, and frequent replacements associated with traditional lead-acid marine batteries. It also solves the problem of underperforming electronics caused by voltage sag—our LiFePO4 chemistry holds a steady voltage until completely depleted.
What's Included
[FILL: WHAT'S INCLUDED]
Compatibility
This is a universal flat-fit design manufactured in the standard Group 31 form factor, meaning it works as a direct drop-in replacement for existing Group 31 marine or RV battery setups. It operates seamlessly with standard 12V alternators and marine charging systems supporting a 14.2V - 14.6V charging profile. Ideal for marine house power, engine cranking, RV house banks, trolling motors, and solar storage applications.
Installation
Estimated Time: 15–30 minutes
Difficulty: Beginner
Tools Needed: Basic socket set or wrench to disconnect the old battery and torque your existing ring terminals onto the new battery posts.
Key Specs
| Nominal Voltage | 12.8V (12V System) |
| Capacity / Energy | 160Ah / 1980Wh |
| Cold Cranking Amps | 1200 CCA |
| Max Continuous Discharge | 160A |
| Charging Voltage | 14.2V - 14.6V |
| Chemistry | Lithium Iron Phosphate (LiFePO4) |
| Cycle Life | 5,000+ cycles at 80% DoD |
| Form Factor | Group 31 |
| Weight | 38 lbs |
| Operating Temperature | Discharging: -20°C to 60°C | Charging: 0°C to 45°C |
| Durability & Safety | IP67 Rated, Built-in Advanced BMS |
| Certifications | UL 1642, UL 1973, CE, RoHS, UN38.3 |
| Warranty | 8-Year Warranty |
FAQ
Can I use this battery to start my engine and run my trolling motor?
Yes. Unlike standard deep-cycle lithium batteries, this unit pushes 1200 CCA designed specifically for engine cranking, alongside providing 160Ah of true deep-cycle energy storage for motors and electronics.
Will this fit in my existing battery tray?
Yes, this is built precisely to a Group 31 blueprint. As long as your current setup accommodates a standard Group 31 battery, it is a simple drop-in swap.
Will the battery be damaged if I charge it in freezing weather?
No. The integrated BMS includes a low-temperature charging cutoff. If the internal temperature drops below 0°C (32°F), it automatically prevents a charge to protect the lithium cells from permanent damage.
Return policy
Our goal is for every customer to be totally satisfied with their purchase. If this isn't the case, let us know and we'll do our best to work with you to make it right.
Shipping
We will work quickly to ship your order as soon as possible. Once your order has shipped, you will receive an email with further information. Delivery times vary depending on your location.
Manufacturing
Our products are manufactured both locally and globally. We carefully select our manufacturing partners to ensure our products are high quality and a fair value.